Controller.



No. 829,794. I PATENTED AUG. 28, 1906. H. LEMP.

CONTROLLER.

APPLICATION FILED DEG.l8, 1905.

F? 1 1? m1; W K 5 i L2 mfi W M Witnessas: A g m' W Inventor:

R Hermann Lemp,

ym/KM,

To all whom it may. concern:

HERMANN LEMP, OF LYNN, MASSACHUSETTS ASSIGNOR T GENERAL ELECTRIC COMPANY, A COEPQRATION OF NEW YORK' CONTROLLER,

Specification of Letters Pa ent.

Patented Aug. 28, 19665 Application filed December 16,1905, ammo. 292.214.

Be it known that I, HERMANN LEMP, a. citizen of the United States, residing at Lynn, county of Essex, State of Massachusetts, have invented certain new and useful- Imovements in Controllers, of which the fol owing is a specification. i

reversing controllers which are provided with separate braking-points for connecting theimotors as braking-generators after they have been running in forward and reverse dn'ections, res ectively, it is difiicult to stopthe controllerandle at the proper brakingpoints, for unless particular care is exercised the controller may pass the desired braking position and connect the motor or motors for reverse operation. It is highly desirable, that the-controller may be sto ped into the desired braking osition an maintained there without mahing it necessary for the o erator to watch the controller-handle; and t e present invention hasfor its object a construction and arrangement of partsfor autodirection without re .mairs, and K a controller.

matically bringing the controller-handle to rest in the forward braking position when the motor has been running in a forward direction and the reverse braking position when the motor has been running in the reverse the operator to note the extent to w 'ch e is moving the handle;

The" present invention will be more fully understood, and further ob'ects and advantages will a pear from the ollowing description=thereo taken in connection with the accompanying drawings, which illustrate a preferred embodiment.

' In said drawings, Figure 1 is a plan view of a controller arranged in accordance with the presentinvention. Fig. 2 is a cross-section through the upper portion of the controller and its operating-handle; and Fig. 3 shows, diagrammatically, the developed controllercylinderand the motors, together with the connections between the controller-contacts and the motors and source of current-supply.

Referring to Fi 3, Mend M represent two motors, L an L thecurrent-shpplying The controller is illustrated as consis r of a series of fixed contacts or fingers I; an two sets of movable contactsc an o ada ted to 006 crate with the fixed dontacts; e type 0 controller, aatwell' as the number of its operative positions,-may, of course, be varied, since the pres ent invention is not confined to any particular form of controlleror motor-control sys- Jtem. In the; construction shown two braking positions, two forward, and two reverse {running positions, together with an ofif position, are provided. The forward running positions are those in which the contacts engage with the contacts I) along lines f ff respectively, while the braking position-to which the controller is moved when it is desired to cause the motors to act as braking- ;generators after they have been running in the forward direction isthat inwhich the contacts 0 engage with the stationary con-. tacts along line f f Similarly 1' r and r r indicate the-reverse running positions of thecontroller, and r r the reverse braking posi- 'tion. 'Thus it will be noticed that when the motors have been running and it is desired to brake, the controller is moved backward to and beyond the off position inorder-to reach gthe'proper braking position.

It is believed to be unnecessary to trace the various circuits, since it is evident from the drawings'that in the twov forward running po sitions'the motors are connected first in series 7 and then in parallelacross the line, while in the forward braking position the relative con nections of the motor fields and armaturesare reversed and the two motors are'short-cir-' cuited through a braking resistance R, and

similarly in the reverse running positions the motors are-first connected in series and then in parallel across the line for operation in the reverse direction, while in the reverse braking position the relative connections of the'ar'ma tures and fields are changed and the motors are short-circuited through the braking resistance. I

The present invention contemplates movablesto mechanism so constructed and arranged t at the operator need simply turn the "handle of the controller backward from any running positionin order to bring it into and stop itln the desired braking position, while.

it remains within the o erators power to move the controllerban is freely from a forprojecting from its upper surface. The disk may be oscillated about its pivotuntil one of the shoulders 4 or 5 engages with a portion 6 of the controller-casing, and the parts are so dimensioned that this movement of the disk permits the stop 3 to oscillate between extreme limits which'correspond to the braking positions of the controller. On the controller- .handle 7 there is arranged a pivoted stop or dog 8, normally held in the plane of the pin by means of a spring 9. Thus it will be seen that if the con oller-handle is in either of the positions 7" or f and is turned backward the dog 8 will engage the pin 3 and will oscillate the disk into one .of its extreme positions, whereupon the disk will come to a stop and prevent further movement of the controllerhandle, being now in positionf which is the desired braking position. If, on the other hand, the controller-handle is in position r or 1" and is turned backward, the dog in the controller-handle strikes the pin on the opposite side and oscillates the disk until it is brought to rest in its other extreme position, the controller -'handle being now brought to rest in position r which is the reverse braking position. y

In order that the.controllerhandle may be moved from the off position into one of the runningupositions without being stopped in the bra ng position, there is provided a pushbutton 10 1n the grip of the controller-hand dle, the stem ofthis push-button engaging with one end of the dog 8. Consequently when the push-button is depressed the dog 8 is lifted out of the plane oi the stop or pin 3 and. the controller-handle may .be. moved freely without interference on the part of the stop; It is of course evident that the movable stop need not be mounted on a segmental disk, as shown, or that the stop 3 be movable, since in some of its aspects the present invention contemplates any arrangement of cooperating stops upon the controller-handle and on the fixed support wherein. either of the stops is movable relative to its support between the desired limits.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a controller, a movable contact niember having runningpositions and forward and reverse braking positions, and a movable stop adapted to engage with said contact member and bring it to rest in one braking position or the other depending upon the direction from which said member is moved relative to the stop.

2. In a controller, a movable member having running positions and forward and reverse braking positions, a stop movable within limits corresponding to said braking positions, and a projection on said contact member adapted to engage with said stop and carry it to one extreme position or the other depending upon the direction from which said projection'is moved into engagement with the stop.

saa'res 3. In a controller, a rotary contact memher having an off position and forward and reverse running positions on opposite sides of the oil position, together with forward and reverse braking positions respectively on the reverse and forward running sides of the controller, a stop movable within limits corresponding to said braking posi. tions, a dog associated with said contact ward and reverse braking positions res ec tively on the reverse and running sides 0 the controller, a stop movable within limits corresponding to said bralring positions, an operating-handle for said co tact member, a dog carried by said handle and arranged normally in the plane of said stop, and a pushbutton in. said handle for lifting said dog out of the plane of the stop.

5. In a controller, a movable contact member having an ofi position, a reverse braking position and forward running positions on. one'side of the off position, together with forward braking and reverse running positions on' the opposite side of the off position, a stop movable within limits corresponding to said braking positions, and a projection on said movable contact member adapted to engage said stop and bring said contact member to rest either in the forward braking position when said member is moved past the -off positionv from the forward running positions or in the reverse braking position when said member is moved past the on position from the reverse running positions.

6. In a controller, a casing, a movable contact member supported by said casing and having two operative positions, stops on said contact member and on said 'casing one of said stops being movable within limits corresponding to the said operative positlons of the contact member, and means for causing said stops to engage to bring said contact member to rest in either of said operative positions.

7. In a controller, a rotary contact member having an off position and forward.

and reverse running positions on op osite sides of the oil position, together Wit forward and reverse braking ositions respectively on 'the reverse and orward running sides of the controller, stops supported respectively on a fixed sup ort and upon said movable upon its support between limits corresponding to said braking positions, and meansfor causing saidstops to engage to contact member, one 0 said stops beingbring said contact member to rest in either braking position.

8. In combination, a motor or group of motors, a source of currentsupply, a controller having contacts constructed and connected to connect said motor or group of motors to saidsource of supply for rotation in either direction in the running positionsof the controller and to connect said motor or group of motors as braking-generators in the braking positions of the controller, stops sup ported respectively upon the movable member of said controller and upon a fixed sup port, one of said stops being movable on itssupport between limits corresponding to the 15 braking positions of the controller, and means for causing said stops to engage to bring said movable contact member to rest in either of said braking positions.

In Witness whereof} have hereunto set my 2 hand this 13th day of December, 1905.

HEEMANN LEMP.

Witnesses:

J OI-IN A. ll IChLlANU5, JI., HENRY 0. WEsTENDARP. 

